CompactWindmills mod adds a compact version of the classic IC2 Windmill. It can produce more energy as one block, but it also is a little bit more pricy. Because it is a compact version of the Windmill and within one Block, a 256 EU/t Energy farm with CompactWindmills causes less lag than a 256EU/t Energy farm with normal Windmills. Like the normal Windmills, they are more efficient the more space is around them, so make sure to not place the in a bad slot.